Weather Forecasts, Road Conditions, and Weather Radar for I-5

Current & 7-day weather forecast, road conditions, and weather radar for all of US interstate I-5.
All times shown in your local timezone

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Road Trip and Weather Conditions for Interstate I-5

Interstate I-5 is the main arterial interstate for the west coast of the United States. It runs north-south from Blaine, Washington, to Chula Vista, California (near San Diego). It is the only interstate in the US that connects from a border crossing of Canada to a border crossing of Mexico. Along the way, it crosses through the states of Washington, Oregon, and California, running 1,381 miles in length.

Interstate I-5 passes through many of the largest cities of the west coast. It passes through Seattle, Washington, Portland, Oregon, and Sacramento, Los Angeles, and San Diego, California. At the San Ysidro Port of Entry at the Mexico border, over 70,000 vehicles cross the border every day. At the northern border, at the Peach Arch Border Crossing into Canada, about 4,800 cars cross the border every day (trucks are prohibited at this crossing and must cross the Pacific Highway Border Crossing roughly one mile to the east).

Weather Conditions for Interstate I-5

The Pacific Northwest experiences heavy rainfall throughout the year, as a natural rainforest climate zone stretching from the Canadian border, through Washington, and ending south of Portland, Oregon. Rainfall plus snowfall in some areas average up to 167 inches of rain each year. Heavy fog is also common throughout this area.

Between the border of Oregon and California, I-5 crosses its highest point over the pass of Siskiyou Summit. The pass sits 4,310 feet above sea level and the pass experiences a 2,300 foot elevation change within a 6 mile span. Heavy snow is common from November through April.

Major Junctions of I-5

In Washington:

  • I-5 South begins at the Canada-US border in Blaine, Washington.
  • I-5 has a major junction at I-405 in Lynnwood, Washington.
  • I-5 has a major junction at I-90 in Seattle, Washington.
  • I-5 has a major junction at I-405 in Tukwila, Washington.
  • I-5 has a major junction at I-705 in Tacoma, Washington.
  • I-5 has a major junction at I-205 in Salmon Creek, Washington.

In Oregon:

  • I-5 has major junctions at I-84 and I-405 in Portland, Oregon.
  • I-5 has a major junction at I-205 in Tualatin, Oregon.
  • I-5 has a major junction at I-105 in Eugene, Oregon.

In California:

  • I-5 has a major junction at US-97 in Weed, California.
  • I-5 has a major junction at I-505 in Dunnigan, California.
  • I-5 has major junctions at I-80 and I-305 in Sacramento, California.
  • I-5 has a major junction at I-205 in Lathrop, California.
  • I-5 has a major junction at I-580 in Vernalis, California.
  • I-5 has a major junction at I-210 in Sylmar, California.
  • I-5 has a major junction at I-405 in Mission Hills, California.
  • I-5 has a major junction at I-10 in Boyle Heights, California.
  • I-5 has a major junction at I-710 in Commerce, California.
  • I-5 has a major junction at I-605 in Downey, California.
  • I-5 has a major junction at I-405 in Irvine, California.
  • I-5 has a major junction at I-8 in San Diego, California.
  • I-5 has a major junction at I-805 in San Ysidro, California.
  • I-5 North begins at the Mexico-US border in San Ysidro, California.

This map shows the current & 7-day weather forecast, road conditions, and weather radar for all of US interstate I-5.